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Railways Sample Paper RRB (Group D) Sample Test Paper-13

  • question_answer
    The printed price of a book is Rs. 320. A retailer pays Rs. 244.80 for it. He gets successive discounts of 10% and an another rate. His second rate is:

    A)  15%                

    B)              16%

    C)  14%    

    D)         12%

    Correct Answer: A

    Solution :

    [a] Printed price = Rs. 320, \[{{d}_{1}}=10%\] Let\[{{d}_{2}}=x%\]Amount actually paid =Rs. 244.80 So, amount actually paid =\[\left( 1-\,\frac{10}{100} \right)\,\,\left( 1-\,\frac{x}{100} \right)\times 320\] \[244.80=\frac{90}{100}\times \frac{(100-\,x)}{100}\times 320\] \[100-\,x=\frac{244.80\times 100\times 100}{90\times 320}=85\Rightarrow \,\,x=15%\]


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